HBaseAdmin (HBase - Client 0.98.2-hadoop2 API)

java.lang.Object
- org.apache.hadoop.hbase.client.HBaseAdmin

All Implemented Interfaces:

Closeable, AutoCloseable, Abortable
```
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class HBaseAdmin
extends Object
implements Abortable, Closeable
```
Provides an interface to manage HBase database table metadata + general administrative functions. Use HBaseAdmin to create, drop, list, enable and disable tables. Use it also to add and drop table column families.
See HTable to add, update, and delete data from an individual table.
Currently HBaseAdmin instances are not expected to be long-lived. For example, an HBaseAdmin instance will not ride over a Master restart.

Constructor Summary

Constructors
Constructor and Description
`HBaseAdmin(org.apache.hadoop.conf.Configuration c)` Constructor.
`HBaseAdmin(HConnection connection)` Constructor for externally managed HConnections.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`abort(String why, Throwable e)` Abort the server or client.
`void`	`addColumn(byte[] tableName, HColumnDescriptor column)` Add a column to an existing table.
`void`	`addColumn(String tableName, HColumnDescriptor column)` Add a column to an existing table.
`void`	`addColumn(TableName tableName, HColumnDescriptor column)` Add a column to an existing table.
`void`	`assign(byte[] regionName)`
`boolean`	`balancer()` Invoke the balancer.
`static void`	`checkHBaseAvailable(org.apache.hadoop.conf.Configuration conf)` Check to see if HBase is running.
`void`	`cloneSnapshot(byte[] snapshotName, byte[] tableName)` Create a new table by cloning the snapshot content.
`void`	`cloneSnapshot(byte[] snapshotName, TableName tableName)` Create a new table by cloning the snapshot content.
`void`	`cloneSnapshot(String snapshotName, String tableName)` Create a new table by cloning the snapshot content.
`void`	`cloneSnapshot(String snapshotName, TableName tableName)` Create a new table by cloning the snapshot content.
`void`	`close()`
`void`	`closeRegion(byte[] regionname, String serverName)` Close a region.
`void`	`closeRegion(ServerName sn, HRegionInfo hri)` Close a region.
`void`	`closeRegion(String regionname, String serverName)` Close a region.
`boolean`	`closeRegionWithEncodedRegionName(String encodedRegionName, String serverName)` For expert-admins.
`void`	`compact(byte[] tableNameOrRegionName)` Compact a table or an individual region.
`void`	`compact(byte[] tableNameOrRegionName, byte[] columnFamily)` Compact a column family within a table or region.
`void`	`compact(String tableNameOrRegionName)` Compact a table or an individual region.
`void`	`compact(String tableOrRegionName, String columnFamily)` Compact a column family within a table or region.
`CoprocessorRpcChannel`	`coprocessorService()` Creates and returns a `RpcChannel` instance connected to the active master.
`void`	`createNamespace(NamespaceDescriptor descriptor)` Create a new namespace
`void`	`createTable(HTableDescriptor desc)` Creates a new table.
`void`	`createTable(HTableDescriptor desc, byte[][] splitKeys)` Creates a new table with an initial set of empty regions defined by the specified split keys.
`void`	`createTable(HTableDescriptor desc, byte[] startKey, byte[] endKey, int numRegions)` Creates a new table with the specified number of regions.
`void`	`createTableAsync(HTableDescriptor desc, byte[][] splitKeys)` Creates a new table but does not block and wait for it to come online.
`void`	`deleteColumn(byte[] tableName, String columnName)` Delete a column from a table.
`void`	`deleteColumn(String tableName, String columnName)` Delete a column from a table.
`void`	`deleteColumn(TableName tableName, byte[] columnName)` Delete a column from a table.
`void`	`deleteNamespace(String name)` Delete an existing namespace.
`void`	`deleteSnapshot(byte[] snapshotName)` Delete an existing snapshot.
`void`	`deleteSnapshot(String snapshotName)` Delete an existing snapshot.
`void`	`deleteSnapshots(Pattern pattern)` Delete existing snapshots whose names match the pattern passed.
`void`	`deleteSnapshots(String regex)` Delete existing snapshots whose names match the pattern passed.
`void`	`deleteTable(byte[] tableName)`
`void`	`deleteTable(String tableName)`
`void`	`deleteTable(TableName tableName)` Deletes a table.
`HTableDescriptor[]`	`deleteTables(Pattern pattern)` Delete tables matching the passed in pattern and wait on completion.
`HTableDescriptor[]`	`deleteTables(String regex)` Deletes tables matching the passed in pattern and wait on completion.
`void`	`disableTable(byte[] tableName)`
`void`	`disableTable(String tableName)`
`void`	`disableTable(TableName tableName)` Disable table and wait on completion.
`void`	`disableTableAsync(byte[] tableName)`
`void`	`disableTableAsync(String tableName)`
`void`	`disableTableAsync(TableName tableName)` Starts the disable of a table.
`HTableDescriptor[]`	`disableTables(Pattern pattern)` Disable tables matching the passed in pattern and wait on completion.
`HTableDescriptor[]`	`disableTables(String regex)` Disable tables matching the passed in pattern and wait on completion.
`boolean`	`enableCatalogJanitor(boolean enable)` Enable/Disable the catalog janitor
`void`	`enableTable(byte[] tableName)`
`void`	`enableTable(String tableName)`
`void`	`enableTable(TableName tableName)` Enable a table.
`void`	`enableTableAsync(byte[] tableName)`
`void`	`enableTableAsync(String tableName)`
`void`	`enableTableAsync(TableName tableName)` Brings a table on-line (enables it).
`HTableDescriptor[]`	`enableTables(Pattern pattern)` Enable tables matching the passed in pattern and wait on completion.
`HTableDescriptor[]`	`enableTables(String regex)` Enable tables matching the passed in pattern and wait on completion.
`void`	`execProcedure(String signature, String instance, Map<String,String> props)` Execute a distributed procedure on a cluster.
`void`	`flush(byte[] tableNameOrRegionName)` Flush a table or an individual region.
`void`	`flush(String tableNameOrRegionName)` Flush a table or an individual region.
`Pair<Integer,Integer>`	`getAlterStatus(byte[] tableName)` Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
`Pair<Integer,Integer>`	`getAlterStatus(TableName tableName)` Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
`ClusterStatus`	`getClusterStatus()`
`AdminProtos.GetRegionInfoResponse.CompactionState`	`getCompactionState(byte[] tableNameOrRegionName)` Get the current compaction state of a table or region.
`AdminProtos.GetRegionInfoResponse.CompactionState`	`getCompactionState(String tableNameOrRegionName)` Get the current compaction state of a table or region.
`org.apache.hadoop.conf.Configuration`	`getConfiguration()`
`HConnection`	`getConnection()`
`String[]`	`getMasterCoprocessors()`
`NamespaceDescriptor`	`getNamespaceDescriptor(String name)` Get a namespace descriptor by name
`List<HRegionInfo>`	`getOnlineRegions(ServerName sn)` Get all the online regions on a region server.
`HTableDescriptor`	`getTableDescriptor(byte[] tableName)`
`HTableDescriptor`	`getTableDescriptor(TableName tableName)` Method for getting the tableDescriptor
`HTableDescriptor[]`	`getTableDescriptors(List<String> names)` Get tableDescriptors
`HTableDescriptor[]`	`getTableDescriptorsByTableName(List<TableName> tableNames)` Get tableDescriptors
`String[]`	`getTableNames()` Deprecated.
`String[]`	`getTableNames(Pattern pattern)` Deprecated.
`String[]`	`getTableNames(String regex)` Deprecated.
`List<HRegionInfo>`	`getTableRegions(byte[] tableName)`
`List<HRegionInfo>`	`getTableRegions(TableName tableName)` get the regions of a given table.
`boolean`	`isAborted()` Check if the server or client was aborted.
`boolean`	`isCatalogJanitorEnabled()` Query on the catalog janitor state (Enabled/Disabled?)
`boolean`	`isMasterRunning()`
`boolean`	`isProcedureFinished(String signature, String instance, Map<String,String> props)` Check the current state of the specified procedure.
`boolean`	`isSnapshotFinished(HBaseProtos.SnapshotDescription snapshot)` Check the current state of the passed snapshot.
`boolean`	`isTableAvailable(byte[] tableName)`
`boolean`	`isTableAvailable(byte[] tableName, byte[][] splitKeys)`
`boolean`	`isTableAvailable(String tableName)`
`boolean`	`isTableAvailable(String tableName, byte[][] splitKeys)`
`boolean`	`isTableAvailable(TableName tableName)`
`boolean`	`isTableAvailable(TableName tableName, byte[][] splitKeys)` Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table.
`boolean`	`isTableDisabled(byte[] tableName)`
`boolean`	`isTableDisabled(String tableName)`
`boolean`	`isTableDisabled(TableName tableName)`
`boolean`	`isTableEnabled(byte[] tableName)`
`boolean`	`isTableEnabled(String tableName)`
`boolean`	`isTableEnabled(TableName tableName)`
`NamespaceDescriptor[]`	`listNamespaceDescriptors()` List available namespace descriptors
`List<HBaseProtos.SnapshotDescription>`	`listSnapshots()` List completed snapshots.
`List<HBaseProtos.SnapshotDescription>`	`listSnapshots(Pattern pattern)` List all the completed snapshots matching the given pattern.
`List<HBaseProtos.SnapshotDescription>`	`listSnapshots(String regex)` List all the completed snapshots matching the given regular expression.
`HTableDescriptor[]`	`listTableDescriptorsByNamespace(String name)` Get list of table descriptors by namespace
`TableName[]`	`listTableNames()` List all of the names of userspace tables.
`TableName[]`	`listTableNamesByNamespace(String name)` Get list of table names by namespace
`HTableDescriptor[]`	`listTables()` List all the userspace tables.
`HTableDescriptor[]`	`listTables(Pattern pattern)` List all the userspace tables matching the given pattern.
`HTableDescriptor[]`	`listTables(String regex)` List all the userspace tables matching the given regular expression.
`void`	`majorCompact(byte[] tableNameOrRegionName)` Major compact a table or an individual region.
`void`	`majorCompact(byte[] tableNameOrRegionName, byte[] columnFamily)` Major compact a column family within a table or region.
`void`	`majorCompact(String tableNameOrRegionName)` Major compact a table or an individual region.
`void`	`majorCompact(String tableNameOrRegionName, String columnFamily)` Major compact a column family within a table or region.
`void`	`mergeRegions(byte[] encodedNameOfRegionA, byte[] encodedNameOfRegionB, boolean forcible)` Merge two regions.
`void`	`modifyColumn(byte[] tableName, HColumnDescriptor descriptor)` Modify an existing column family on a table.
`void`	`modifyColumn(String tableName, HColumnDescriptor descriptor)` Modify an existing column family on a table.
`void`	`modifyColumn(TableName tableName, HColumnDescriptor descriptor)` Modify an existing column family on a table.
`void`	`modifyNamespace(NamespaceDescriptor descriptor)` Modify an existing namespace
`void`	`modifyTable(byte[] tableName, HTableDescriptor htd)`
`void`	`modifyTable(String tableName, HTableDescriptor htd)`
`void`	`modifyTable(TableName tableName, HTableDescriptor htd)` Modify an existing table, more IRB friendly version.
`void`	`move(byte[] encodedRegionName, byte[] destServerName)` Move the region `r` to `dest`.
`void`	`offline(byte[] regionName)` Offline specified region from master's in-memory state.
`void`	`restoreSnapshot(byte[] snapshotName)` Restore the specified snapshot on the original table.
`void`	`restoreSnapshot(byte[] snapshotName, boolean takeFailSafeSnapshot)` Restore the specified snapshot on the original table.
`void`	`restoreSnapshot(String snapshotName)` Restore the specified snapshot on the original table.
`void`	`restoreSnapshot(String snapshotName, boolean takeFailSafeSnapshot)` Restore the specified snapshot on the original table.
`byte[][]`	`rollHLogWriter(String serverName)` Roll the log writer.
`int`	`runCatalogScan()` Ask for a scan of the catalog table
`boolean`	`setBalancerRunning(boolean on, boolean synchronous)` Turn the load balancer on or off.
`void`	`shutdown()` Shuts down the HBase cluster
`void`	`snapshot(byte[] snapshotName, byte[] tableName)`
`void`	`snapshot(byte[] snapshotName, TableName tableName)` public void snapshot(final String snapshotName, Create a timestamp consistent snapshot for the given table.
`void`	`snapshot(HBaseProtos.SnapshotDescription snapshot)` Take a snapshot and wait for the server to complete that snapshot (blocking).
`void`	`snapshot(String snapshotName, byte[] tableName, HBaseProtos.SnapshotDescription.Type type)`
`void`	`snapshot(String snapshotName, String tableName)`
`void`	`snapshot(String snapshotName, String tableName, HBaseProtos.SnapshotDescription.Type type)`
`void`	`snapshot(String snapshotName, TableName tableName)` Take a snapshot for the given table.
`void`	`snapshot(String snapshotName, TableName tableName, HBaseProtos.SnapshotDescription.Type type)` Create typed snapshot of the table.
`void`	`split(byte[] tableNameOrRegionName)` Split a table or an individual region.
`void`	`split(byte[] tableNameOrRegionName, byte[] splitPoint)` Split a table or an individual region.
`void`	`split(String tableNameOrRegionName)` Split a table or an individual region.
`void`	`split(String tableNameOrRegionName, String splitPoint)`
`void`	`stopMaster()` Shuts down the current HBase master only.
`void`	`stopRegionServer(String hostnamePort)` Stop the designated regionserver
`boolean`	`tableExists(byte[] tableName)`
`boolean`	`tableExists(String tableName)`
`boolean`	`tableExists(TableName tableName)`
`MasterProtos.SnapshotResponse`	`takeSnapshotAsync(HBaseProtos.SnapshotDescription snapshot)` Take a snapshot without waiting for the server to complete that snapshot (asynchronous)
`void`	`unassign(byte[] regionName, boolean force)` Unassign a region from current hosting regionserver.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HBaseAdmin
```
public HBaseAdmin(org.apache.hadoop.conf.Configuration c)
           throws MasterNotRunningException,
                  ZooKeeperConnectionException,
                  IOException
```
    Constructor. See HBaseAdmin(HConnection connection)
    
    Parameters:
    c - Configuration object. Copied internally.
    
    Throws:
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
    
    IOException
  - HBaseAdmin
```
public HBaseAdmin(HConnection connection)
           throws MasterNotRunningException,
                  ZooKeeperConnectionException
```
    Constructor for externally managed HConnections. The connection to master will be created when required by admin functions.
    
    Parameters:
    connection - The HConnection instance to use
    
    Throws:
    
    MasterNotRunningException, - ZooKeeperConnectionException are not thrown anymore but kept into the interface for backward api compatibility
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
- Method Detail
  - abort
```
public void abort(String why,
         Throwable e)
```
    Description copied from interface: Abortable
    
    Abort the server or client.
    
    Specified by:
    
    abort in interface Abortable
    
    Parameters:
    why - Why we're aborting.
    e - Throwable that caused abort. Can be null.
  - isAborted
```
public boolean isAborted()
```
    Description copied from interface: Abortable
    
    Check if the server or client was aborted.
    
    Specified by:
    
    isAborted in interface Abortable
    
    Returns:
    true if the server or client was aborted, false otherwise
  - getConnection
```
public HConnection getConnection()
```
    Returns:
    HConnection used by this object.
  - isMasterRunning
```
public boolean isMasterRunning()
                        throws MasterNotRunningException,
                               ZooKeeperConnectionException
```
    Returns:
    - true if the master server is running. Throws an exception otherwise.
    
    Throws:
    
    ZooKeeperConnectionException
    
    MasterNotRunningException
  - tableExists
```
public boolean tableExists(TableName tableName)
                    throws IOException
```
    Parameters:
    tableName - Table to check.
    
    Returns:
    True if table exists already.
    
    Throws:
    
    IOException
  - tableExists
```
public boolean tableExists(byte[] tableName)
                    throws IOException
```
    Throws:
    
    IOException
  - tableExists
```
public boolean tableExists(String tableName)
                    throws IOException
```
    Throws:
    
    IOException
  - listTables
```
public HTableDescriptor[] listTables()
                              throws IOException
```
    List all the userspace tables. In other words, scan the hbase:meta table. If we wanted this to be really fast, we could implement a special catalog table that just contains table names and their descriptors. Right now, it only exists as part of the hbase:meta table's region info.
    
    Returns:
    - returns an array of HTableDescriptors
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - listTables
```
public HTableDescriptor[] listTables(Pattern pattern)
                              throws IOException
```
    List all the userspace tables matching the given pattern.
    
    Parameters:
    pattern - The compiled regular expression to match against
    
    Returns:
    - returns an array of HTableDescriptors
    
    Throws:
    
    IOException - if a remote or network exception occurs
    See Also:
    listTables()
  - listTables
```
public HTableDescriptor[] listTables(String regex)
                              throws IOException
```
    List all the userspace tables matching the given regular expression.
    
    Parameters:
    regex - The regular expression to match against
    
    Returns:
    - returns an array of HTableDescriptors
    
    Throws:
    
    IOException - if a remote or network exception occurs
    See Also:
    listTables(java.util.regex.Pattern)
  - getTableNames
```
@Deprecated
public String[] getTableNames()
                       throws IOException
```
    Deprecated.
    
    List all of the names of userspace tables.
    
    Returns:
    String[] table names
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getTableNames
```
@Deprecated
public String[] getTableNames(Pattern pattern)
                       throws IOException
```
    Deprecated.
    
    List all of the names of userspace tables matching the given regular expression.
    
    Parameters:
    pattern - The regular expression to match against
    
    Returns:
    String[] table names
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getTableNames
```
@Deprecated
public String[] getTableNames(String regex)
                       throws IOException
```
    Deprecated.
    
    List all of the names of userspace tables matching the given regular expression.
    
    Parameters:
    regex - The regular expression to match against
    
    Returns:
    String[] table names
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - listTableNames
```
public TableName[] listTableNames()
                           throws IOException
```
    List all of the names of userspace tables.
    
    Returns:
    TableName[] table names
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getTableDescriptor
```
public HTableDescriptor getTableDescriptor(TableName tableName)
                                    throws TableNotFoundException,
                                           IOException
```
    Method for getting the tableDescriptor
    
    Parameters:
    tableName - as a byte []
    
    Returns:
    the tableDescriptor
    
    Throws:
    
    TableNotFoundException
    
    IOException - if a remote or network exception occurs
  - getTableDescriptor
```
public HTableDescriptor getTableDescriptor(byte[] tableName)
                                    throws TableNotFoundException,
                                           IOException
```
    Throws:
    
    TableNotFoundException
    
    IOException
  - createTable
```
public void createTable(HTableDescriptor desc)
                 throws IOException
```
    Creates a new table. Synchronous operation.
    
    Parameters:
    desc - table descriptor for table
    
    Throws:
    
    IllegalArgumentException - if the table name is reserved
    
    MasterNotRunningException - if master is not running
    
    TableExistsException - if table already exists (If concurrent threads, the table may have been created between test-for-existence and attempt-at-creation).
    
    IOException - if a remote or network exception occurs
  - createTable
```
public void createTable(HTableDescriptor desc,
               byte[] startKey,
               byte[] endKey,
               int numRegions)
                 throws IOException
```
    Creates a new table with the specified number of regions. The start key specified will become the end key of the first region of the table, and the end key specified will become the start key of the last region of the table (the first region has a null start key and the last region has a null end key). BigInteger math will be used to divide the key range specified into enough segments to make the required number of total regions. Synchronous operation.
    
    Parameters:
    desc - table descriptor for table
    startKey - beginning of key range
    endKey - end of key range
    numRegions - the total number of regions to create
    
    Throws:
    
    IllegalArgumentException - if the table name is reserved
    
    MasterNotRunningException - if master is not running
    
    TableExistsException - if table already exists (If concurrent threads, the table may have been created between test-for-existence and attempt-at-creation).
    
    IOException
  - createTable
```
public void createTable(HTableDescriptor desc,
               byte[][] splitKeys)
                 throws IOException
```
    Creates a new table with an initial set of empty regions defined by the specified split keys. The total number of regions created will be the number of split keys plus one. Synchronous operation. Note : Avoid passing empty split key.
    
    Parameters:
    desc - table descriptor for table
    splitKeys - array of split keys for the initial regions of the table
    
    Throws:
    
    IllegalArgumentException - if the table name is reserved, if the split keys are repeated and if the split key has empty byte array.
    
    MasterNotRunningException - if master is not running
    
    TableExistsException - if table already exists (If concurrent threads, the table may have been created between test-for-existence and attempt-at-creation).
    
    IOException
  - createTableAsync
```
public void createTableAsync(HTableDescriptor desc,
                    byte[][] splitKeys)
                      throws IOException
```
    Creates a new table but does not block and wait for it to come online. Asynchronous operation. To check if the table exists, use isTableAvailable(org.apache.hadoop.hbase.TableName) -- it is not safe to create an HTable instance to this table before it is available. Note : Avoid passing empty split key.
    
    Parameters:
    desc - table descriptor for table
    
    Throws:
    
    IllegalArgumentException - Bad table name, if the split keys are repeated and if the split key has empty byte array.
    
    MasterNotRunningException - if master is not running
    
    TableExistsException - if table already exists (If concurrent threads, the table may have been created between test-for-existence and attempt-at-creation).
    
    IOException
  - deleteTable
```
public void deleteTable(String tableName)
                 throws IOException
```
    Throws:
    
    IOException
  - deleteTable
```
public void deleteTable(byte[] tableName)
                 throws IOException
```
    Throws:
    
    IOException
  - deleteTable
```
public void deleteTable(TableName tableName)
                 throws IOException
```
    Deletes a table. Synchronous operation.
    
    Parameters:
    tableName - name of table to delete
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteTables
```
public HTableDescriptor[] deleteTables(String regex)
                                throws IOException
```
    Deletes tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.lang.String) and deleteTable(byte[])
    
    Parameters:
    regex - The regular expression to match table names against
    
    Returns:
    Table descriptors for tables that couldn't be deleted
    
    Throws:
    
    IOException
    See Also:
    deleteTables(java.util.regex.Pattern), deleteTable(java.lang.String)
  - deleteTables
```
public HTableDescriptor[] deleteTables(Pattern pattern)
                                throws IOException
```
    Delete tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.util.regex.Pattern) and deleteTable(byte[])
    
    Parameters:
    pattern - The pattern to match table names against
    
    Returns:
    Table descriptors for tables that couldn't be deleted
    
    Throws:
    
    IOException
  - enableTable
```
public void enableTable(TableName tableName)
                 throws IOException
```
    Enable a table. May timeout. Use enableTableAsync(byte[]) and isTableEnabled(byte[]) instead. The table has to be in disabled state for it to be enabled.
    
    Parameters:
    tableName - name of the table
    
    Throws:
    
    IOException - if a remote or network exception occurs There could be couple types of IOException TableNotFoundException means the table doesn't exist. TableNotDisabledException means the table isn't in disabled state.
    See Also:
    isTableEnabled(byte[]), disableTable(byte[]), enableTableAsync(byte[])
  - enableTable
```
public void enableTable(byte[] tableName)
                 throws IOException
```
    Throws:
    
    IOException
  - enableTable
```
public void enableTable(String tableName)
                 throws IOException
```
    Throws:
    
    IOException
  - enableTableAsync
```
public void enableTableAsync(TableName tableName)
                      throws IOException
```
    Brings a table on-line (enables it). Method returns immediately though enable of table may take some time to complete, especially if the table is large (All regions are opened as part of enabling process). Check isTableEnabled(byte[]) to learn when table is fully online. If table is taking too long to online, check server logs.
    
    Parameters:
    tableName -
    
    Throws:
    
    IOException
    Since:
    
    0.90.0
  - enableTableAsync
```
public void enableTableAsync(byte[] tableName)
                      throws IOException
```
    Throws:
    
    IOException
  - enableTableAsync
```
public void enableTableAsync(String tableName)
                      throws IOException
```
    Throws:
    
    IOException
  - enableTables
```
public HTableDescriptor[] enableTables(String regex)
                                throws IOException
```
    Enable tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.lang.String) and enableTable(byte[])
    
    Parameters:
    regex - The regular expression to match table names against
    
    Throws:
    
    IOException
    See Also:
    enableTables(java.util.regex.Pattern), enableTable(java.lang.String)
  - enableTables
```
public HTableDescriptor[] enableTables(Pattern pattern)
                                throws IOException
```
    Enable tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.util.regex.Pattern) and enableTable(byte[])
    
    Parameters:
    pattern - The pattern to match table names against
    
    Throws:
    
    IOException
  - disableTableAsync
```
public void disableTableAsync(TableName tableName)
                       throws IOException
```
    Starts the disable of a table. If it is being served, the master will tell the servers to stop serving it. This method returns immediately. The disable of a table can take some time if the table is large (all regions are closed as part of table disable operation). Call isTableDisabled(byte[]) to check for when disable completes. If table is taking too long to online, check server logs.
    
    Parameters:
    tableName - name of table
    
    Throws:
    
    IOException - if a remote or network exception occurs
    Since:
    
    0.90.0
    
    See Also:
    isTableDisabled(byte[]), isTableEnabled(byte[])
  - disableTableAsync
```
public void disableTableAsync(byte[] tableName)
                       throws IOException
```
    Throws:
    
    IOException
  - disableTableAsync
```
public void disableTableAsync(String tableName)
                       throws IOException
```
    Throws:
    
    IOException
  - disableTable
```
public void disableTable(TableName tableName)
                  throws IOException
```
    Disable table and wait on completion. May timeout eventually. Use disableTableAsync(byte[]) and isTableDisabled(String) instead. The table has to be in enabled state for it to be disabled.
    
    Parameters:
    tableName -
    
    Throws:
    
    IOException - There could be couple types of IOException TableNotFoundException means the table doesn't exist. TableNotEnabledException means the table isn't in enabled state.
  - disableTable
```
public void disableTable(byte[] tableName)
                  throws IOException
```
    Throws:
    
    IOException
  - disableTable
```
public void disableTable(String tableName)
                  throws IOException
```
    Throws:
    
    IOException
  - disableTables
```
public HTableDescriptor[] disableTables(String regex)
                                 throws IOException
```
    Disable tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.lang.String) and disableTable(byte[])
    
    Parameters:
    regex - The regular expression to match table names against
    
    Returns:
    Table descriptors for tables that couldn't be disabled
    
    Throws:
    
    IOException
    See Also:
    disableTables(java.util.regex.Pattern), disableTable(java.lang.String)
  - disableTables
```
public HTableDescriptor[] disableTables(Pattern pattern)
                                 throws IOException
```
    Disable tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(java.util.regex.Pattern) and disableTable(byte[])
    
    Parameters:
    pattern - The pattern to match table names against
    
    Returns:
    Table descriptors for tables that couldn't be disabled
    
    Throws:
    
    IOException
  - isTableEnabled
```
public boolean isTableEnabled(TableName tableName)
                       throws IOException
```
    Parameters:
    tableName - name of table to check
    
    Returns:
    true if table is on-line
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableEnabled
```
public boolean isTableEnabled(byte[] tableName)
                       throws IOException
```
    Throws:
    
    IOException
  - isTableEnabled
```
public boolean isTableEnabled(String tableName)
                       throws IOException
```
    Throws:
    
    IOException
  - isTableDisabled
```
public boolean isTableDisabled(TableName tableName)
                        throws IOException
```
    Parameters:
    tableName - name of table to check
    
    Returns:
    true if table is off-line
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableDisabled
```
public boolean isTableDisabled(byte[] tableName)
                        throws IOException
```
    Throws:
    
    IOException
  - isTableDisabled
```
public boolean isTableDisabled(String tableName)
                        throws IOException
```
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(TableName tableName)
                         throws IOException
```
    Parameters:
    tableName - name of table to check
    
    Returns:
    true if all regions of the table are available
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableAvailable
```
public boolean isTableAvailable(byte[] tableName)
                         throws IOException
```
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(String tableName)
                         throws IOException
```
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(TableName tableName,
                       byte[][] splitKeys)
                         throws IOException
```
    Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table. Note : If this api is used after a table's region gets splitted, the api may return false.
    
    Parameters:
    tableName - name of table to check
    splitKeys - keys to check if the table has been created with all split keys
    
    Throws:
    
    IOException - if a remote or network excpetion occurs
  - isTableAvailable
```
public boolean isTableAvailable(byte[] tableName,
                       byte[][] splitKeys)
                         throws IOException
```
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(String tableName,
                       byte[][] splitKeys)
                         throws IOException
```
    Throws:
    
    IOException
  - getAlterStatus
```
public Pair<Integer,Integer> getAlterStatus(TableName tableName)
                                     throws IOException
```
    Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
    
    Parameters:
    tableName - TableName instance
    
    Returns:
    Pair indicating the number of regions updated Pair.getFirst() is the regions that are yet to be updated Pair.getSecond() is the total number of regions of the table
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getAlterStatus
```
public Pair<Integer,Integer> getAlterStatus(byte[] tableName)
                                     throws IOException
```
    Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
    
    Parameters:
    tableName - name of the table to get the status of
    
    Returns:
    Pair indicating the number of regions updated Pair.getFirst() is the regions that are yet to be updated Pair.getSecond() is the total number of regions of the table
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - addColumn
```
public void addColumn(byte[] tableName,
             HColumnDescriptor column)
               throws IOException
```
    Add a column to an existing table. Asynchronous operation.
    
    Parameters:
    tableName - name of the table to add column to
    column - column descriptor of column to be added
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - addColumn
```
public void addColumn(String tableName,
             HColumnDescriptor column)
               throws IOException
```
    Add a column to an existing table. Asynchronous operation.
    
    Parameters:
    tableName - name of the table to add column to
    column - column descriptor of column to be added
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - addColumn
```
public void addColumn(TableName tableName,
             HColumnDescriptor column)
               throws IOException
```
    Add a column to an existing table. Asynchronous operation.
    
    Parameters:
    tableName - name of the table to add column to
    column - column descriptor of column to be added
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteColumn
```
public void deleteColumn(byte[] tableName,
                String columnName)
                  throws IOException
```
    Delete a column from a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    columnName - name of column to be deleted
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteColumn
```
public void deleteColumn(String tableName,
                String columnName)
                  throws IOException
```
    Delete a column from a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    columnName - name of column to be deleted
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteColumn
```
public void deleteColumn(TableName tableName,
                byte[] columnName)
                  throws IOException
```
    Delete a column from a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    columnName - name of column to be deleted
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - modifyColumn
```
public void modifyColumn(String tableName,
                HColumnDescriptor descriptor)
                  throws IOException
```
    Modify an existing column family on a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    descriptor - new column descriptor to use
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - modifyColumn
```
public void modifyColumn(byte[] tableName,
                HColumnDescriptor descriptor)
                  throws IOException
```
    Modify an existing column family on a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    descriptor - new column descriptor to use
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - modifyColumn
```
public void modifyColumn(TableName tableName,
                HColumnDescriptor descriptor)
                  throws IOException
```
    Modify an existing column family on a table. Asynchronous operation.
    
    Parameters:
    tableName - name of table
    descriptor - new column descriptor to use
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - closeRegion
```
public void closeRegion(String regionname,
               String serverName)
                 throws IOException
```
    Close a region. For expert-admins. Runs close on the regionserver. The master will not be informed of the close.
    
    Parameters:
    regionname - region name to close
    serverName - If supplied, we'll use this location rather than the one currently in hbase:meta
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - closeRegion
```
public void closeRegion(byte[] regionname,
               String serverName)
                 throws IOException
```
    Close a region. For expert-admins Runs close on the regionserver. The master will not be informed of the close.
    
    Parameters:
    regionname - region name to close
    serverName - The servername of the regionserver. If passed null we will use servername found in the hbase:meta table. A server name is made of host, port and startcode. Here is an example: host187.example.com,60020,1289493121758
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - closeRegionWithEncodedRegionName
```
public boolean closeRegionWithEncodedRegionName(String encodedRegionName,
                                       String serverName)
                                         throws IOException
```
    For expert-admins. Runs close on the regionserver. Closes a region based on the encoded region name. The region server name is mandatory. If the servername is provided then based on the online regions in the specified regionserver the specified region will be closed. The master will not be informed of the close. Note that the regionname is the encoded regionname.
    
    Parameters:
    encodedRegionName - The encoded region name; i.e. the hash that makes up the region name suffix: e.g. if regionname is TestTable,0094429456,1289497600452.527db22f95c8a9e0116f0cc13c680396. , then the encoded region name is: 527db22f95c8a9e0116f0cc13c680396.
    serverName - The servername of the regionserver. A server name is made of host, port and startcode. This is mandatory. Here is an example: host187.example.com,60020,1289493121758
    
    Returns:
    true if the region was closed, false if not.
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - closeRegion
```
public void closeRegion(ServerName sn,
               HRegionInfo hri)
                 throws IOException
```
    Close a region. For expert-admins Runs close on the regionserver. The master will not be informed of the close.
    
    Parameters:
    sn -
    hri -
    
    Throws:
    
    IOException
  - getOnlineRegions
```
public List<HRegionInfo> getOnlineRegions(ServerName sn)
                                   throws IOException
```
    Get all the online regions on a region server.
    
    Throws:
    
    IOException
  - flush
```
public void flush(String tableNameOrRegionName)
           throws IOException,
                  InterruptedException
```
    Flush a table or an individual region. Synchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to flush
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - flush
```
public void flush(byte[] tableNameOrRegionName)
           throws IOException,
                  InterruptedException
```
    Flush a table or an individual region. Synchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to flush
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - compact
```
public void compact(String tableNameOrRegionName)
             throws IOException,
                    InterruptedException
```
    Compact a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to compact
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - compact
```
public void compact(byte[] tableNameOrRegionName)
             throws IOException,
                    InterruptedException
```
    Compact a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to compact
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - compact
```
public void compact(String tableOrRegionName,
           String columnFamily)
             throws IOException,
                    InterruptedException
```
    Compact a column family within a table or region. Asynchronous operation.
    
    Parameters:
    tableOrRegionName - table or region to compact
    columnFamily - column family within a table or region
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - compact
```
public void compact(byte[] tableNameOrRegionName,
           byte[] columnFamily)
             throws IOException,
                    InterruptedException
```
    Compact a column family within a table or region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to compact
    columnFamily - column family within a table or region
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - majorCompact
```
public void majorCompact(String tableNameOrRegionName)
                  throws IOException,
                         InterruptedException
```
    Major compact a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - majorCompact
```
public void majorCompact(byte[] tableNameOrRegionName)
                  throws IOException,
                         InterruptedException
```
    Major compact a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - majorCompact
```
public void majorCompact(String tableNameOrRegionName,
                String columnFamily)
                  throws IOException,
                         InterruptedException
```
    Major compact a column family within a table or region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    columnFamily - column family within a table or region
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - majorCompact
```
public void majorCompact(byte[] tableNameOrRegionName,
                byte[] columnFamily)
                  throws IOException,
                         InterruptedException
```
    Major compact a column family within a table or region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    columnFamily - column family within a table or region
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - move
```
public void move(byte[] encodedRegionName,
        byte[] destServerName)
          throws HBaseIOException,
                 MasterNotRunningException,
                 ZooKeeperConnectionException
```
    Move the region r to dest.
    
    Parameters:
    encodedRegionName - The encoded region name; i.e. the hash that makes up the region name suffix: e.g. if regionname is TestTable,0094429456,1289497600452.527db22f95c8a9e0116f0cc13c680396., then the encoded region name is: 527db22f95c8a9e0116f0cc13c680396.
    destServerName - The servername of the destination regionserver. If passed the empty byte array we'll assign to a random server. A server name is made of host, port and startcode. Here is an example: host187.example.com,60020,1289493121758
    
    Throws:
    
    UnknownRegionException - Thrown if we can't find a region named encodedRegionName
    
    ZooKeeperConnectionException
    
    MasterNotRunningException
    
    HBaseIOException
  - assign
```
public void assign(byte[] regionName)
            throws MasterNotRunningException,
                   ZooKeeperConnectionException,
                   IOException
```
    Parameters:
    regionName - Region name to assign.
    
    Throws:
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
    
    IOException
  - unassign
```
public void unassign(byte[] regionName,
            boolean force)
              throws MasterNotRunningException,
                     ZooKeeperConnectionException,
                     IOException
```
    Unassign a region from current hosting regionserver. Region will then be assigned to a regionserver chosen at random. Region could be reassigned back to the same server. Use move(byte[], byte[]) if you want to control the region movement.
    
    Parameters:
    regionName - Region to unassign. Will clear any existing RegionPlan if one found.
    force - If true, force unassign (Will remove region from regions-in-transition too if present. If results in double assignment use hbck -fix to resolve. To be used by experts).
    
    Throws:
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
    
    IOException
  - offline
```
public void offline(byte[] regionName)
             throws IOException
```
    Offline specified region from master's in-memory state. It will not attempt to reassign the region as in unassign. This API can be used when a region not served by any region server and still online as per Master's in memory state. If this API is incorrectly used on active region then master will loose track of that region. This is a special method that should be used by experts or hbck.
    
    Parameters:
    regionName - Region to offline.
    
    Throws:
    
    IOException
  - setBalancerRunning
```
public boolean setBalancerRunning(boolean on,
                         boolean synchronous)
                           throws MasterNotRunningException,
                                  ZooKeeperConnectionException
```
    Turn the load balancer on or off.
    
    Parameters:
    on - If true, enable balancer. If false, disable balancer.
    synchronous - If true, it waits until current balance() call, if outstanding, to return.
    
    Returns:
    Previous balancer value
    
    Throws:
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
  - balancer
```
public boolean balancer()
                 throws MasterNotRunningException,
                        ZooKeeperConnectionException,
                        ServiceException
```
    Invoke the balancer. Will run the balancer and if regions to move, it will go ahead and do the reassignments. Can NOT run for various reasons. Check logs.
    
    Returns:
    True if balancer ran, false otherwise.
    
    Throws:
    
    MasterNotRunningException
    
    ZooKeeperConnectionException
    
    ServiceException
  - enableCatalogJanitor
```
public boolean enableCatalogJanitor(boolean enable)
                             throws ServiceException,
                                    MasterNotRunningException
```
    Enable/Disable the catalog janitor
    
    Parameters:
    enable - if true enables the catalog janitor
    
    Returns:
    the previous state
    
    Throws:
    
    ServiceException
    
    MasterNotRunningException
  - runCatalogScan
```
public int runCatalogScan()
                   throws ServiceException,
                          MasterNotRunningException
```
    Ask for a scan of the catalog table
    
    Returns:
    the number of entries cleaned
    
    Throws:
    
    ServiceException
    
    MasterNotRunningException
  - isCatalogJanitorEnabled
```
public boolean isCatalogJanitorEnabled()
                                throws ServiceException,
                                       MasterNotRunningException
```
    Query on the catalog janitor state (Enabled/Disabled?)
    
    Throws:
    
    ServiceException
    
    MasterNotRunningException
  - mergeRegions
```
public void mergeRegions(byte[] encodedNameOfRegionA,
                byte[] encodedNameOfRegionB,
                boolean forcible)
                  throws IOException
```
    Merge two regions. Asynchronous operation.
    
    Parameters:
    encodedNameOfRegionA - encoded name of region a
    encodedNameOfRegionB - encoded name of region b
    forcible - true if do a compulsory merge, otherwise we will only merge two adjacent regions
    
    Throws:
    
    IOException
  - split
```
public void split(String tableNameOrRegionName)
           throws IOException,
                  InterruptedException
```
    Split a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table or region to split
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - split
```
public void split(byte[] tableNameOrRegionName)
           throws IOException,
                  InterruptedException
```
    Split a table or an individual region. Implicitly finds an optimal split point. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table to region to split
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - split
```
public void split(String tableNameOrRegionName,
         String splitPoint)
           throws IOException,
                  InterruptedException
```
    Throws:
    
    IOException
    
    InterruptedException
  - split
```
public void split(byte[] tableNameOrRegionName,
         byte[] splitPoint)
           throws IOException,
                  InterruptedException
```
    Split a table or an individual region. Asynchronous operation.
    
    Parameters:
    tableNameOrRegionName - table to region to split
    splitPoint - the explicit position to split on
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException - interrupt exception occurred
  - modifyTable
```
public void modifyTable(TableName tableName,
               HTableDescriptor htd)
                 throws IOException
```
    Modify an existing table, more IRB friendly version. Asynchronous operation. This means that it may be a while before your schema change is updated across all of the table.
    
    Parameters:
    tableName - name of table.
    htd - modified description of the table
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - modifyTable
```
public void modifyTable(byte[] tableName,
               HTableDescriptor htd)
                 throws IOException
```
    Throws:
    
    IOException
  - modifyTable
```
public void modifyTable(String tableName,
               HTableDescriptor htd)
                 throws IOException
```
    Throws:
    
    IOException
  - shutdown
```
public void shutdown()
              throws IOException
```
    Shuts down the HBase cluster
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - stopMaster
```
public void stopMaster()
                throws IOException
```
    Shuts down the current HBase master only. Does not shutdown the cluster.
    
    Throws:
    
    IOException - if a remote or network exception occurs
    See Also:
    shutdown()
  - stopRegionServer
```
public void stopRegionServer(String hostnamePort)
                      throws IOException
```
    Stop the designated regionserver
    
    Parameters:
    hostnamePort - Hostname and port delimited by a : as in example.org:1234
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getClusterStatus
```
public ClusterStatus getClusterStatus()
                               throws IOException
```
    Returns:
    cluster status
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getConfiguration
```
public org.apache.hadoop.conf.Configuration getConfiguration()
```
    Returns:
    Configuration used by the instance.
  - createNamespace
```
public void createNamespace(NamespaceDescriptor descriptor)
                     throws IOException
```
    Create a new namespace
    
    Parameters:
    descriptor - descriptor which describes the new namespace
    
    Throws:
    
    IOException
  - modifyNamespace
```
public void modifyNamespace(NamespaceDescriptor descriptor)
                     throws IOException
```
    Modify an existing namespace
    
    Parameters:
    descriptor - descriptor which describes the new namespace
    
    Throws:
    
    IOException
  - deleteNamespace
```
public void deleteNamespace(String name)
                     throws IOException
```
    Delete an existing namespace. Only empty namespaces (no tables) can be removed.
    
    Parameters:
    name - namespace name
    
    Throws:
    
    IOException
  - getNamespaceDescriptor
```
public NamespaceDescriptor getNamespaceDescriptor(String name)
                                           throws IOException
```
    Get a namespace descriptor by name
    
    Parameters:
    name - name of namespace descriptor
    
    Returns:
    A descriptor
    
    Throws:
    
    IOException
  - listNamespaceDescriptors
```
public NamespaceDescriptor[] listNamespaceDescriptors()
                                               throws IOException
```
    List available namespace descriptors
    
    Returns:
    List of descriptors
    
    Throws:
    
    IOException
  - listTableDescriptorsByNamespace
```
public HTableDescriptor[] listTableDescriptorsByNamespace(String name)
                                                   throws IOException
```
    Get list of table descriptors by namespace
    
    Parameters:
    name - namespace name
    
    Returns:
    A descriptor
    
    Throws:
    
    IOException
  - listTableNamesByNamespace
```
public TableName[] listTableNamesByNamespace(String name)
                                      throws IOException
```
    Get list of table names by namespace
    
    Parameters:
    name - namespace name
    
    Returns:
    The list of table names in the namespace
    
    Throws:
    
    IOException
  - checkHBaseAvailable
```
public static void checkHBaseAvailable(org.apache.hadoop.conf.Configuration conf)
                                throws MasterNotRunningException,
                                       ZooKeeperConnectionException,
                                       ServiceException,
                                       IOException
```
    Check to see if HBase is running. Throw an exception if not. We consider that HBase is running if ZooKeeper and Master are running.
    
    Parameters:
    conf - system configuration
    
    Throws:
    
    MasterNotRunningException - if the master is not running
    
    ZooKeeperConnectionException - if unable to connect to zookeeper
    
    ServiceException
    
    IOException
  - getTableRegions
```
public List<HRegionInfo> getTableRegions(TableName tableName)
                                  throws IOException
```
    get the regions of a given table.
    
    Parameters:
    tableName - the name of the table
    
    Returns:
    Ordered list of HRegionInfo.
    
    Throws:
    
    IOException
  - getTableRegions
```
public List<HRegionInfo> getTableRegions(byte[] tableName)
                                  throws IOException
```
    Throws:
    
    IOException
  - close
```
public void close()
           throws IOException
```
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Throws:
    
    IOException
  - getTableDescriptorsByTableName
```
public HTableDescriptor[] getTableDescriptorsByTableName(List<TableName> tableNames)
                                                  throws IOException
```
    Get tableDescriptors
    
    Parameters:
    tableNames - List of table names
    
    Returns:
    HTD[] the tableDescriptor
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getTableDescriptors
```
public HTableDescriptor[] getTableDescriptors(List<String> names)
                                       throws IOException
```
    Get tableDescriptors
    
    Parameters:
    names - List of table names
    
    Returns:
    HTD[] the tableDescriptor
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - rollHLogWriter
```
public byte[][] rollHLogWriter(String serverName)
                        throws IOException,
                               FailedLogCloseException
```
    Roll the log writer. That is, start writing log messages to a new file.
    
    Parameters:
    serverName - The servername of the regionserver. A server name is made of host, port and startcode. This is mandatory. Here is an example: host187.example.com,60020,1289493121758
    
    Returns:
    If lots of logs, flush the returned regions so next time through we can clean logs. Returns null if nothing to flush. Names are actual region names as returned by HRegionInfo.getEncodedName()
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    FailedLogCloseException
  - getMasterCoprocessors
```
public String[] getMasterCoprocessors()
```
  - getCompactionState
```
public AdminProtos.GetRegionInfoResponse.CompactionState getCompactionState(String tableNameOrRegionName)
                                                                     throws IOException,
                                                                            InterruptedException
```
    Get the current compaction state of a table or region. It could be in a major compaction, a minor compaction, both, or none.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    
    Returns:
    the current compaction state
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - getCompactionState
```
public AdminProtos.GetRegionInfoResponse.CompactionState getCompactionState(byte[] tableNameOrRegionName)
                                                                     throws IOException,
                                                                            InterruptedException
```
    Get the current compaction state of a table or region. It could be in a major compaction, a minor compaction, both, or none.
    
    Parameters:
    tableNameOrRegionName - table or region to major compact
    
    Returns:
    the current compaction state
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    InterruptedException
  - snapshot
```
public void snapshot(String snapshotName,
            TableName tableName)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Take a snapshot for the given table. If the table is enabled, a FLUSH-type snapshot will be taken. If the table is disabled, an offline snapshot is taken.
    Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming.
    Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]).
    
    Parameters:
    snapshotName - name of the snapshot to be created
    tableName - name of the table for which snapshot is created
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    SnapshotCreationException - if snapshot creation failed
    
    IllegalArgumentException - if the snapshot request is formatted incorrectly
  - snapshot
```
public void snapshot(String snapshotName,
            String tableName)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Throws:
    
    IOException
    
    SnapshotCreationException
    
    IllegalArgumentException
  - snapshot
```
public void snapshot(byte[] snapshotName,
            TableName tableName)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    public void snapshot(final String snapshotName, Create a timestamp consistent snapshot for the given table. final byte[] tableName) throws IOException,
    Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming.
    Snapshot names follow the same naming constraints as tables in HBase.
    
    Parameters:
    snapshotName - name of the snapshot to be created
    tableName - name of the table for which snapshot is created
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    SnapshotCreationException - if snapshot creation failed
    
    IllegalArgumentException - if the snapshot request is formatted incorrectly
  - snapshot
```
public void snapshot(byte[] snapshotName,
            byte[] tableName)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Throws:
    
    IOException
    
    SnapshotCreationException
    
    IllegalArgumentException
  - snapshot
```
public void snapshot(String snapshotName,
            TableName tableName,
            HBaseProtos.SnapshotDescription.Type type)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Create typed snapshot of the table.
    Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming.
    Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]).
    
    Parameters:
    snapshotName - name to give the snapshot on the filesystem. Must be unique from all other snapshots stored on the cluster
    tableName - name of the table to snapshot
    type - type of snapshot to take
    
    Throws:
    
    IOException - we fail to reach the master
    
    SnapshotCreationException - if snapshot creation failed
    
    IllegalArgumentException - if the snapshot request is formatted incorrectly
  - snapshot
```
public void snapshot(String snapshotName,
            String tableName,
            HBaseProtos.SnapshotDescription.Type type)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Throws:
    
    IOException
    
    SnapshotCreationException
    
    IllegalArgumentException
  - snapshot
```
public void snapshot(String snapshotName,
            byte[] tableName,
            HBaseProtos.SnapshotDescription.Type type)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Throws:
    
    IOException
    
    SnapshotCreationException
    
    IllegalArgumentException
  - snapshot
```
public void snapshot(HBaseProtos.SnapshotDescription snapshot)
              throws IOException,
                     SnapshotCreationException,
                     IllegalArgumentException
```
    Take a snapshot and wait for the server to complete that snapshot (blocking).
    Only a single snapshot should be taken at a time for an instance of HBase, or results may be undefined (you can tell multiple HBase clusters to snapshot at the same time, but only one at a time for a single cluster).
    Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming.
    Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]).
    You should probably use snapshot(String, String) or snapshot(byte[], byte[]) unless you are sure about the type of snapshot that you want to take.
    
    Parameters:
    snapshot - snapshot to take
    
    Throws:
    
    IOException - or we lose contact with the master.
    
    SnapshotCreationException - if snapshot failed to be taken
    
    IllegalArgumentException - if the snapshot request is formatted incorrectly
  - takeSnapshotAsync
```
public MasterProtos.SnapshotResponse takeSnapshotAsync(HBaseProtos.SnapshotDescription snapshot)
                                                throws IOException,
                                                       SnapshotCreationException
```
    Take a snapshot without waiting for the server to complete that snapshot (asynchronous)
    Only a single snapshot should be taken at a time, or results may be undefined.
    
    Parameters:
    snapshot - snapshot to take
    
    Returns:
    response from the server indicating the max time to wait for the snapshot
    
    Throws:
    
    IOException - if the snapshot did not succeed or we lose contact with the master.
    
    SnapshotCreationException - if snapshot creation failed
    
    IllegalArgumentException - if the snapshot request is formatted incorrectly
  - isSnapshotFinished
```
public boolean isSnapshotFinished(HBaseProtos.SnapshotDescription snapshot)
                           throws IOException,
                                  HBaseSnapshotException,
                                  UnknownSnapshotException
```
    Check the current state of the passed snapshot.
    There are three possible states:
    1. running - returns false
    2. finished - returns true
    3. finished with error - throws the exception that caused the snapshot to fail
    The cluster only knows about the most recent snapshot. Therefore, if another snapshot has been run/started since the snapshot your are checking, you will recieve an UnknownSnapshotException.
    Parameters:
    snapshot - description of the snapshot to check
    
    Returns:
    true if the snapshot is completed, false if the snapshot is still running
    
    Throws:
    
    IOException - if we have a network issue
    
    HBaseSnapshotException - if the snapshot failed
    
    UnknownSnapshotException - if the requested snapshot is unknown
  - restoreSnapshot
```
public void restoreSnapshot(byte[] snapshotName)
                     throws IOException,
                            RestoreSnapshotException
```
    Restore the specified snapshot on the original table. (The table must be disabled) If the "hbase.snapshot.restore.take.failsafe.snapshot" configuration property is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted.
    
    Parameters:
    snapshotName - name of the snapshot to restore
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    RestoreSnapshotException - if snapshot failed to be restored
    
    IllegalArgumentException - if the restore request is formatted incorrectly
  - restoreSnapshot
```
public void restoreSnapshot(String snapshotName)
                     throws IOException,
                            RestoreSnapshotException
```
    Restore the specified snapshot on the original table. (The table must be disabled) If the "hbase.snapshot.restore.take.failsafe.snapshot" configuration property is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted.
    
    Parameters:
    snapshotName - name of the snapshot to restore
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    RestoreSnapshotException - if snapshot failed to be restored
    
    IllegalArgumentException - if the restore request is formatted incorrectly
  - restoreSnapshot
```
public void restoreSnapshot(byte[] snapshotName,
                   boolean takeFailSafeSnapshot)
                     throws IOException,
                            RestoreSnapshotException
```
    Restore the specified snapshot on the original table. (The table must be disabled) If 'takeFailSafeSnapshot' is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted. The failsafe snapshot name is configurable by using the property "hbase.snapshot.restore.failsafe.name".
    
    Parameters:
    snapshotName - name of the snapshot to restore
    takeFailSafeSnapshot - true if the failsafe snapshot should be taken
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    RestoreSnapshotException - if snapshot failed to be restored
    
    IllegalArgumentException - if the restore request is formatted incorrectly
  - restoreSnapshot
```
public void restoreSnapshot(String snapshotName,
                   boolean takeFailSafeSnapshot)
                     throws IOException,
                            RestoreSnapshotException
```
    Restore the specified snapshot on the original table. (The table must be disabled) If 'takeFailSafeSnapshot' is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted. The failsafe snapshot name is configurable by using the property "hbase.snapshot.restore.failsafe.name".
    
    Parameters:
    snapshotName - name of the snapshot to restore
    takeFailSafeSnapshot - true if the failsafe snapshot should be taken
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    RestoreSnapshotException - if snapshot failed to be restored
    
    IllegalArgumentException - if the restore request is formatted incorrectly
  - cloneSnapshot
```
public void cloneSnapshot(byte[] snapshotName,
                 byte[] tableName)
                   throws IOException,
                          TableExistsException,
                          RestoreSnapshotException,
                          InterruptedException
```
    Create a new table by cloning the snapshot content.
    
    Parameters:
    snapshotName - name of the snapshot to be cloned
    tableName - name of the table where the snapshot will be restored
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    TableExistsException - if table to be created already exists
    
    RestoreSnapshotException - if snapshot failed to be cloned
    
    IllegalArgumentException - if the specified table has not a valid name
    
    InterruptedException
  - cloneSnapshot
```
public void cloneSnapshot(byte[] snapshotName,
                 TableName tableName)
                   throws IOException,
                          TableExistsException,
                          RestoreSnapshotException,
                          InterruptedException
```
    Create a new table by cloning the snapshot content.
    
    Parameters:
    snapshotName - name of the snapshot to be cloned
    tableName - name of the table where the snapshot will be restored
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    TableExistsException - if table to be created already exists
    
    RestoreSnapshotException - if snapshot failed to be cloned
    
    IllegalArgumentException - if the specified table has not a valid name
    
    InterruptedException
  - cloneSnapshot
```
public void cloneSnapshot(String snapshotName,
                 String tableName)
                   throws IOException,
                          TableExistsException,
                          RestoreSnapshotException,
                          InterruptedException
```
    Create a new table by cloning the snapshot content.
    
    Parameters:
    snapshotName - name of the snapshot to be cloned
    tableName - name of the table where the snapshot will be restored
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    TableExistsException - if table to be created already exists
    
    RestoreSnapshotException - if snapshot failed to be cloned
    
    IllegalArgumentException - if the specified table has not a valid name
    
    InterruptedException
  - cloneSnapshot
```
public void cloneSnapshot(String snapshotName,
                 TableName tableName)
                   throws IOException,
                          TableExistsException,
                          RestoreSnapshotException,
                          InterruptedException
```
    Create a new table by cloning the snapshot content.
    
    Parameters:
    snapshotName - name of the snapshot to be cloned
    tableName - name of the table where the snapshot will be restored
    
    Throws:
    
    IOException - if a remote or network exception occurs
    
    TableExistsException - if table to be created already exists
    
    RestoreSnapshotException - if snapshot failed to be cloned
    
    IllegalArgumentException - if the specified table has not a valid name
    
    InterruptedException
  - execProcedure
```
public void execProcedure(String signature,
                 String instance,
                 Map<String,String> props)
                   throws IOException
```
    Execute a distributed procedure on a cluster.
    
    Parameters:
    signature - A distributed procedure is uniquely identified by its signature (default the root ZK node name of the procedure).
    instance - The instance name of the procedure. For some procedures, this parameter is optional.
    props - Property/Value pairs of properties passing to the procedure
    
    Throws:
    
    IOException
  - isProcedureFinished
```
public boolean isProcedureFinished(String signature,
                          String instance,
                          Map<String,String> props)
                            throws IOException
```
    Check the current state of the specified procedure.
    There are three possible states:
    1. running - returns false
    2. finished - returns true
    3. finished with error - throws the exception that caused the procedure to fail
    Parameters:
    signature - The signature that uniquely identifies a procedure
    instance - The instance name of the procedure
    props - Property/Value pairs of properties passing to the procedure
    
    Returns:
    true if the specified procedure is finished successfully, false if it is still running
    
    Throws:
    
    IOException - if the specified procedure finished with error
  - listSnapshots
```
public List<HBaseProtos.SnapshotDescription> listSnapshots()
                                                    throws IOException
```
    List completed snapshots.
    
    Returns:
    a list of snapshot descriptors for completed snapshots
    
    Throws:
    
    IOException - if a network error occurs
  - listSnapshots
```
public List<HBaseProtos.SnapshotDescription> listSnapshots(String regex)
                                                    throws IOException
```
    List all the completed snapshots matching the given regular expression.
    
    Parameters:
    regex - The regular expression to match against
    
    Returns:
    - returns a List of SnapshotDescription
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - listSnapshots
```
public List<HBaseProtos.SnapshotDescription> listSnapshots(Pattern pattern)
                                                    throws IOException
```
    List all the completed snapshots matching the given pattern.
    
    Parameters:
    pattern - The compiled regular expression to match against
    
    Returns:
    - returns a List of SnapshotDescription
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteSnapshot
```
public void deleteSnapshot(byte[] snapshotName)
                    throws IOException
```
    Delete an existing snapshot.
    
    Parameters:
    snapshotName - name of the snapshot
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteSnapshot
```
public void deleteSnapshot(String snapshotName)
                    throws IOException
```
    Delete an existing snapshot.
    
    Parameters:
    snapshotName - name of the snapshot
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteSnapshots
```
public void deleteSnapshots(String regex)
                     throws IOException
```
    Delete existing snapshots whose names match the pattern passed.
    
    Parameters:
    regex - The regular expression to match against
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - deleteSnapshots
```
public void deleteSnapshots(Pattern pattern)
                     throws IOException
```
    Delete existing snapshots whose names match the pattern passed.
    
    Parameters:
    pattern - pattern for names of the snapshot to match
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - coprocessorService
```
public CoprocessorRpcChannel coprocessorService()
```
    Creates and returns a RpcChannel instance connected to the active master.
    The obtained RpcChannel instance can be used to access a published coprocessor Service using standard protobuf service invocations:
    CoprocessorRpcChannel channel = myAdmin.coprocessorService(); MyService.BlockingInterface service = MyService.newBlockingStub(channel); MyCallRequest request = MyCallRequest.newBuilder() ... .build(); MyCallResponse response = service.myCall(null, request);
    Returns:
    A MasterCoprocessorRpcChannel instance

Class HBaseAdmin

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

HBaseAdmin

HBaseAdmin

Method Detail

abort

isAborted

getConnection

isMasterRunning

tableExists

tableExists

tableExists

listTables

listTables

listTables

getTableNames

getTableNames

getTableNames

listTableNames

getTableDescriptor

getTableDescriptor

createTable

createTable

createTable

createTableAsync

deleteTable

deleteTable

deleteTable

deleteTables

deleteTables

enableTable

enableTable

enableTable

enableTableAsync

enableTableAsync

enableTableAsync

enableTables

enableTables

disableTableAsync

disableTableAsync

disableTableAsync

disableTable

disableTable

disableTable

disableTables

disableTables

isTableEnabled

isTableEnabled

isTableEnabled

isTableDisabled

isTableDisabled

isTableDisabled

isTableAvailable

isTableAvailable

isTableAvailable

isTableAvailable

isTableAvailable

isTableAvailable

getAlterStatus

getAlterStatus

addColumn

addColumn

addColumn

deleteColumn

deleteColumn

deleteColumn

modifyColumn

modifyColumn

modifyColumn

closeRegion

closeRegion

closeRegionWithEncodedRegionName

closeRegion

getOnlineRegions

flush

flush

compact